Technical information

Nonvolatile Parameter Database

2-128 AT+i Commands Reference Manual May 31, 2008

Note:

The I/ATI and I/<IP Address> messages are sent only if:

• W24 is set to communicate with the host over a fixed interface (HIF?0).

• Either the host interface is not a USART, or host<->W24 baud rate is set to a

fixed value (BDRF?a).

• W24 is not configured to operate in SerialNET mode.

2 In a dialup/cellular environment, the I/<IP Address> message is sent only if W24 is

configured to operate in Always Online mode (TUP=2).

+iRRHW - W24 Readiness Hardware Pin

Note: Before specifying the I/O pin for this parameter, it is recommended that you consult the

pin-out section of the W24 datasheet. Incorrect selection of pin might cause unexpected

W24 behavior.

Syntax: AT+iRRHW=<pin>

Defines which of W24's general-purpose I/O pins (GPIO) will be

asserted Low to indicate W24 readiness to the host. W24

readiness indication is specified by the RRA parameter.

Parameters:

pin=0 No hardware indication is given.

pin=1-32 Pins 1-32 of PIOA (general-purpose I/O pins group A).

pin=33-64 Pins 1-32 of PIOB (general-purpose I/O pins group B).

pin=65-96 Pins 1-32 of PIOC (general-purpose I/O pins group C).

Default: 0 (no hardware indication is given).

Result Code:

I/OK If pin is within limits.

I/ERROR Otherwise.

AT+iRRHW? Reports the current value followed by I/OK.

AT+iRRHW=? Returns the message "0-96" followed by I/OK.